Originally Posted by Jammer
Unvented heaters are hazardous. People have died.
The main hazards posed are fire and CO poisoning.
But if you've come down with the flu, have a pounding headache, can't seem to get warm, and there's a storm outside, you might forget or decide it isn't worth it.
My cousin, his wife and baby daughter were all asphyxiated in a tragic CO accident at their summer home (not RV related). One of the reasons the investigators figured they didn't go outside for help is they all had symptoms of severe flu, but that is how CO comes on, headaches, nausea, vomiting. See Jammer's comments above....
A number of years ago two brothers attended a WBCCI rally in my then home unit. They used a stove top burner for heat apparently. One did not make it through the night. A stove top burner is the same as any unvented heater as far as how it uses oxygen and can produce CO.
And yes, thousands of people have used the unvented heaters with no problems over many years. But there is a sound reason that they are not legal or RVIA approved for use in Recreational Vehicles and never come as factory equipment.
Please understand the dangers of them very well prior to using them in your own RV. You may decide the risks are not worth the benefits. Spend the money you would pay for a non approved propane heater on upgrading your electrical and battery system, for example, and use the original CO safe furnace. (assuming it is in fact rust free, hole free....I had one which was not, and what headaches I got, until I figured the problem out. It was replaced of course).